Oil-separator for pumps.



X. R. KINNEY. OIL SEPARATOR FOR PUMPS.

Arrmou oiq rum smug. e, 1911.

i ,095, 11G Patented May 12, 1914.

2 SHEETS-SHEET l.

I 1 IIIIIIIIIIIIIIfI-I r111 1111111! J. R. KINNE Y.

OIL SEPARATOR FOR PUMPS.

APPLICATION FILED SEPT. B, 1911. 1,096,110. Patented May 12, 1911 2 8EEETB-8HEET 2.

- STATES PATENT onrrcn.

JUsrUs R. KINNEY, F DORGHESTER, MASSACHUSETTS, AssIGNoR r0 THE KINNEY mauurac'rumne COMPANY, or BosromM ssAoHusErTs, A CORPORATION or massaonusnrrs;

Specification of Letters Patent.

OIL-SEPARATOR FOB PUMPS;

Patented May 12, 1914.

Application filed September 8, 1911 Serial No. 648,375. 1

To all whom it may concern: v 'Be it known that I, JUSTUS R. KINNEY,

a citizen of the United States of America,

and a resident of Dorchester, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Oil-Separators for 'Pumps, of which the following is a specification.

This invention relates to oil separators to be used in connection with pump systems, and particularlywith such a system in which a rotary pump is used, having an inlet compartment normally closed by means of an automatic valve.

The object of the present invention is to provide a means whereby the pump is lubricated thoroughly when in operation, and the oil used in this manner is returned to the supply reservoir from which it is originally drawn without waste thereof.

The invention consists primarily in an oil supply tank connected by suitable pipes to the inlet compartment of a rotary pump said inlet compartment being normally closed by means of a valve which is adapted to automatically 'opendurin'g the operation of the pump, the outlet compartment of the pump being connected to the supply tank by means of a pipe extending through the wall thereof and having secured to its inner end a reverse bend.

The invention further consists in certain novel features of construction and arrangement of parts which will be readily under stood by reference to thedescription of the drawings and to the claims hereinafter given. 1 p

Of thedrawings: Figure 1 represents a vertical section of an oil supply tank embodying the features of the present invention, connected to a rotary pump shown in elevation, Fig. 2 represents an enlarged elevation of one form of pump adapted for use in connection with said oil supply tank, the

24. In the present invention compartment 15 is. connected to the piston,

chamber 11 by means of the passage 17, and the outletcompartment 16 is similarly connected to said piston chamber 11 by means of a passage 18 in which is mounted a radial blade 19 secured to or formed upon the annular piston member 14. During the rotation of the piston member 14 in the direction of the arrow a on Fig. 2 of the drawings, the blade 19 will oscillate slightly and reciprocate in the passage 18, and inthis reciprocation the groove 20 formed in said blade will be uncovered sufficiently to permit the material being pumped to pass from the piston chamber 11 into the outlet com. artment 16 frpm which compartment it is a apted to pass through the outlet pipe 21. The inlet compartment 15 is normally closed by means of a valve 22 in the passage 23 thereto, this passage 23 being connected with any suitable source of supply by meanslof the pipe the pump is intended for use in pumping air into a suitable storage tank (not shown) in which the air is intended to be retained under pressure. As soon as the pump commences to operate, the suction created in the inlet compartment will be sufficient to open the valve 22 and permit air under atmospheric pressure to enter the sameand pass through the passage 17 into the piston chamber 11 from which it will ultimately be forced during the rotation of the piston member 14 into the outlet compartment 16 and then through the pipe 21 into an oil tank 25. The pipe 21 extends beyond the inner wall of the tank 25 and has secured to its inner end a continuously curved reverse bend 26, the outlet thereof being above the level of the oil 27 contained in said tank. An air outlet pipe 28 isse- 25 andis provided in its upper portion with a plurality ofperforations 29 through which the air in the tank enters said outlet p1pe 28. From the bottom of the tank 25 extends a return pipe 80 having a valve 31 therein, 10

the opposite end of said pipe enteringthe inlet compartment 15 of the pump at 32. The end of the pipe 30 extends slightly above the inner wall of the tank 25 so that it will not "receive any of the sediment which is liable to collect in the bottom of the tank. This sediment, however, and any water which may accumulate in the bottom of: the tank may be drawn ofi through a pet cook 33 extending through the lower wall of the tank 25. The oil is laced in the tank 25 in such quantities that its level will always be beneath'the reverse bend 26.

In the operation of the invent1on when the valve 31 is slightly opened a portion of the oil 27 will pass through the pipeinto the inlet chamber 15 and when the .pumpis placed in operation, andthc piston revolved in the direction of the arrow a the valve 22 will first be opened to permit the inlet of air under atmospheric pressure to the inlet compartment 15 and thence to the piston chamber 11. As the piston revolves the oil willbe drawn through the pump with the air and lubricate the running parts thereof, and ultimately this oil, thus passing through the piston chamber will be delivered with the air being pumped through the outlet pipe 21 into the tank 25 above the level of the oil 27.

As the air and oil pass through the re verse bend 26, the velocity thereof is greatl reduced and theoil and air are separate the oil being heavier passes down the surface of the inner wall of this reverse bend into the bottom of the tank while the air passes upwardly in the direction of theoutlet pipe 28 therefrom. This reverse bend forms an important feature ofthe present invention. It has been found in practice that it is quite essential that the bend should be positioned as shown in the drawings, that is, extending downwardly fromthe end of the pipe 21. The air thus entering the tank will pass therefrom through the perforations 29 in the outlet pipe 28 into the storage reservoir. The continued admission of air with oil mingled therewith into the tank 25 isliable to cause considerable agitation thereof so that it has been found quite es sential in order to have the air pass fromthe tank free from oil, to provide the perforations 29 in the outlet pipe 28 in the upper portion of said pipe. By such :1

system as this the pump will be thoroughly lubricated while the continued flow of oil from the supply tank 25 into the inlet chamber and through the pump, back again into said supply tank, makes it possible to use the same oil over and over again. In this manner all waste of oil is prevented and the pump is kept in perfect running order at all times. i

Another advantage of this devlce is that the continued circulation of oil keeps the.

operating-parts of the pump cool under all conditions.

I It is believed that the operation and many advantages of the invention will befully understood from the foregoing.

Having thus described my invention, I claim:

1. The combination with a pump provided with an inlet compartment normally closed by an automatic valve adapted to open during the operation of said pump and permit the admission of a fluid to the piston chamber to' be continuously acted upon by the rotation of the piston therein; a horizontal cylindrical tank; a pipe leading from the outlet of said pump to the interior of said tank; an air outlet pipe in the r interior of said tank having a closed end and a plurality of perforations in its upper portion adjacent to the inner surface of said tank; and a return pipe leading from the bottom of said tank to the inlet compartment of said pump. w

2. The combination with a pump provided with an inlet compartment normally closed by an automatic valve adapted to open during the operation of said pump and permit the admission of a fluid to the piston chamber to be continuously acted upon by the rotation of the piston therein; a horizontal'cylindrical tank; a pipe leading from the outlet of said pump to the interior of said tank and provided with a continuously curved reverse bend on its inner end adapted to separate the oil from the air and deflect the former against the end of said tank; an air outlet pipe in the interior of said tank having a closed end and a plurality of perforations in its upper portion adjacent to the inner surface of said tank; and a return pipe leading from the bottom of said tank to the inlet compartment of said pump.

3. The combination with a rotary pump provided with an inlet compartment communicating with the iston chamber; an air inlet'thereto norma ly closed by a valve adapted to be opened by the suction created by the rotation of the piston; a horizontal cylindrical oil tank; a pipe leading therefrom to said inlet compartment; an outlet pipe from said pump extending through one end of said tank into the interior thereof extending portion adjaeent to the inner wall and provided with a continuously curved of said tank.

reverse bend thereon adapted to separate Signed by me at 4 Post Ofiice Sq., Boston,- the oil and air passing therethrough; and a Mass, this 2nd day of September 1911.

- discharge pipe from the opposite end of JUSTUS R. KiNNEY.

said tank, said discharge pipe extending into Witnesses: said tank and being provided with perfora- WALTER E. LOMBARD, tions in the upper portion of said inwardly NA'rnAN C. LOMBARD. 

